NCERT Solutions for Class 9 Biology Chapter 13 - Why Do We Fall Ill ?
Score high marks with the conceptual clarity acquired through TopperLearning’s NCERT Solutions for CBSE Class 9 Biology Chapter 13 Why do we Fall Ill? Learn how to stay healthy and prevent diseases. Revise the symptoms of various sicknesses. Find the ways in which infectious diseases can spread in a community and how to prevent this spread.
By reading the CBSE Class 9 Biology chapter solutions, you will also get to know the process of becoming immune to diseases causing microbes through vaccines. For additional Biology study materials, check our chapter videos, practice tests and more.
Chapter 13 - Why Do We Fall Ill ? Exercise 178
(Any two points)
Chapter 13 - Why Do We Fall Ill ? Exercise 180
Chapter 13 - Why Do We Fall Ill ? Exercise 186
Concept insight: Students should remember the various means of spread of infectious diseases.
(ii) By preventing accumulation of water, anywhere in the school.
(iii) By keeping the toilet neat and clean.
(iv) By avoiding the consumption of uncovered food and other eatables.
(v) By using a handkerchief to cover the mouth while sneezing or coughing.
(vi) By using vaccines and immunization.
(vii) By spraying insecticides after every few months.
Out of these, the major health problems in our area are: Chicken pox, tuberculosis and hepatitis.
Concept insight: List of diseases against which vaccines are made.
Chapter 13 - Why Do We Fall Ill ? Exercise 187
(a) Change in my habits: Now I always make conscious efforts to remain hygienic and eat covered and neat and clean food and fruits.
(b) Change I would wish for in my surroundings: To prevent accumulation of garbage and dirty water and to keep the surroundings neat, clean and hygienic.
Concept insight: Recall the various methods of prevention.
The preventive measures that can be taken by our local authorities to bring down the incidence of these diseases are:
i. By providing fresh, clean and uncontaminated water.
ii. By providing better and hygienic sanitary conditions in the community.
iii. By spreading information about the various preventive measures by posters, pamphlets, etc.
Concept insight: Recall the various methods of prevention of diseases.
Chapter 13 - Why Do We Fall Ill ? Exercise 188
(b) As far as the sickness is concerned, we can report the symptoms which we see in the baby to the doctor and can make his own diagnosis. If need be, he can also conduct some tests for verification and then advise us about the medicines and what things are to be given to the baby.
Concept insight: Recall the various symptoms of a diseased person.
This is because immediately after suffering from malaria, the body is still weak, as during malaria a person has loss of appetite, vomiting and fever.
Moreover, the various organ systems are also most likely not properly recovered and the immune system is also comparatively weak. So, she is likely to get infected with chicken-pox herself which can lead to serious health problems.
Concept insight: Recall the types of diseases-communicable and non communicable diseases.
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